UK Heatwave Strains Supermarket Refrigeration Systems

Extreme heatwaves are causing significant problems for the United Kingdom's food industry, with refrigeration units in supermarkets struggling to maintain adequate temperatures. Older cooling systems, particularly those with external components, are finding it difficult to expel hot air effectively in the rising ambient temperatures.

Rupert Ashby of the British Frozen Food Federation explained that the fundamental operation of refrigerators involves cooling the interior and expelling hot air. "The way the fridges work is to cool everything down and expel the hot air," he said. This process is normally efficient in the UK's typical climate, but "with heat like this, trying to expel that air is very difficult."

Ashby noted that older stores often feature remote compressors for refrigeration units with condensers located outside. These external components are particularly susceptible to failing in extreme heat as they struggle to dissipate the generated heat into an already warm environment. "Because the system is on the outside, it is finding it hard to expel that hot air," he added.

Tesco acknowledged experiencing "a few isolated issues affecting our refrigeration units in stores." A spokesperson stated that maintenance teams worked to resolve these issues swiftly, ensuring that "customers still able to access fresh and frozen products across the vast majority of our stores." The company clarified these incidents were not indicative of a widespread problem across its retail network.

Meteorological forecasts predict another period of high temperatures, with the Met Office anticipating temperatures in the "low to mid 30s" across much of the UK in the coming week. This ongoing heat places further pressure on cooling infrastructure.

Experts involved in refrigeration research are collaborating with supermarkets to re-engineer cooling systems for warmer climates. However, Dr. Foster, who leads a research team working on this issue, cautioned that the transition will not be immediate. "It could take 20 years before all the refrigeration systems out there are at the maximum temperature they are being designed for today. And by then that will be too low," he warned, suggesting that current design standards may soon become insufficient. M